In a fedora template, run this:
sudo -i
curl -x http://localhost:8082 -o /etc/yum.repos.d/secureblue.repo https://repo.secureblue.dev/secureblue.repo
yum update
Then accept the GPG key, and run
yum install trivalent
After you stop the template, Trivalent should show up in the template applications list, and all AppVMs using this template.